Filter and Absorber based on the one-dimensionalphotonic crystal structure

In this paper, a one-dimensional photoniccrystal-based structure on a silicon dioxide substrate isproposed as a filter, and if this substrate is replaced with agold mirror, the proposed structure will act as a narrow-bandperfect absorber. Both structures are simulated using the ۳Dfinite difference time domain numerical method forperpendicular incidence of a plane wave within a ۰.۶-۲.۶ μmwavelength range. Simulation results show that for the filterstructure, the transmission spectrum in the range of ۰.۷ to ۱μm is less than ۱۰%, which means that the proposed filter canwell suppress the radiant light in this range. Also for theabsorber structure, a resonance peak appears in theabsorption spectrum of the device, whose amplitude and fullwidth at half maximum (FWHM) are ۰.۹۹ and ۱۱.۵۴ nm,respectively.

کلیدواژه ها:

Filter ، Perfect Absorber ، Photonic crystal